However, did you know that you can purchase Third-Party Apple Watch Alligator Calf Leather Strap to give you a choice of colours according to your personal preference at low cost? Each third-party Apple Watch alligator calf leather strap comes with a Silver colour adapter that is made of corrosion resistant 316L Stainless Steel (stronger than the standard 304L grade used in many fashion products) and measures 200mm in length.